From 40a79756407301a1beb87c9ecd1c2040bd9347a2 Mon Sep 17 00:00:00 2001
From: Victor Zverovich <victor.zverovich@gmail.com>
Date: Sat, 27 Apr 2019 07:42:27 -0700
Subject: [PATCH] Remove trailing zeros

---
 include/fmt/format.h | 2 ++
 test/format-test.cc  | 1 +
 2 files changed, 3 insertions(+)

diff --git a/include/fmt/format.h b/include/fmt/format.h
index 0e8fb2e4..e426f3bc 100644
--- a/include/fmt/format.h
+++ b/include/fmt/format.h
@@ -1213,6 +1213,8 @@ It grisu2_prettify(const char* digits, int size, int exp, It it,
     if (params.num_digits >= 0 && params.num_digits < num_zeros)
       num_zeros = params.num_digits;
     it = std::fill_n(it, num_zeros, static_cast<Char>('0'));
+    if (!params.trailing_zeros)
+      while (size > 0 && digits[size - 1] == '0') --size;
     it = copy_str<Char>(digits, digits + size, it);
   }
   return it;
diff --git a/test/format-test.cc b/test/format-test.cc
index 94ebcdd5..6cd1b136 100644
--- a/test/format-test.cc
+++ b/test/format-test.cc
@@ -1488,6 +1488,7 @@ TEST(FormatterTest, PrecisionRounding) {
   EXPECT_EQ("0.002", format("{:.3f}", 0.0015));
   EXPECT_EQ("1.000", format("{:.3f}", 0.9999));
   EXPECT_EQ("0.00123", format("{:.3}", 0.00123));
+  EXPECT_EQ("0.1", format("{:.16g}", 0.1));
   // Trigger rounding error in Grisu by a carefully chosen number.
   auto n = 3788512123356.985352;
   char buffer[64];